﻿// ***********************************************************************
// Assembly         : HZH_Controls
// Created          : 08-17-2019
//
// ***********************************************************************
// <copyright file="UCStep.cs">
//     Copyright by Huang Zhenghui(黄正辉) All, QQ group:568015492 QQ:623128629 Email:623128629@qq.com
// </copyright>
//
// Blog: https://www.cnblogs.com/bfyx
// GitHub：https://github.com/kwwwvagaa/NetWinformControl
// gitee：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
//
// If you use this code, please keep this note.
// ***********************************************************************
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;

namespace HZH_Controls.Controls
{
	/// <summary>
	/// Class UCStep.
	/// Implements the <see cref="System.Windows.Forms.UserControl" />
	/// </summary>
	/// <seealso cref="System.Windows.Forms.UserControl" />
	[DefaultEvent("IndexChecked")]
	public partial class UCStep : UserControl
	{

		/// <summary>
		/// Occurs when [index checked].
		/// </summary>
		[Description("步骤更改事件"), Category("自定义")]
		public event EventHandler IndexChecked;

		/// <summary>
		/// The m step back color
		/// </summary>
		private Color m_stepBackColor = Color.FromArgb(189, 189, 189);
		/// <summary>
		/// 步骤背景色
		/// </summary>
		/// <value>The color of the step back.</value>
		[Description("步骤背景色"), Category("自定义")]
		public Color StepBackColor
		{
			get { return m_stepBackColor; }
			set
			{
				m_stepBackColor = value;
				Refresh();
			}
		}

		/// <summary>
		/// The m step fore color
		/// </summary>
		private Color m_stepForeColor = Color.FromArgb(255, 77, 59);
		/// <summary>
		/// 步骤前景色
		/// </summary>
		/// <value>The color of the step fore.</value>
		[Description("步骤前景色"), Category("自定义")]
		public Color StepForeColor
		{
			get { return m_stepForeColor; }
			set
			{
				m_stepForeColor = value;
				Refresh();
			}
		}

		/// <summary>
		/// The m step font color
		/// </summary>
		private Color m_stepFontColor = Color.White;
		/// <summary>
		/// 步骤文字颜色
		/// </summary>
		/// <value>The color of the step font.</value>
		[Description("步骤文字景色"), Category("自定义")]
		public Color StepFontColor
		{
			get { return m_stepFontColor; }
			set
			{
				m_stepFontColor = value;
				Refresh();
			}
		}

		/// <summary>
		/// The m step width
		/// </summary>
		private int m_stepWidth = 35;
		/// <summary>
		/// 步骤宽度
		/// </summary>
		/// <value>The width of the step.</value>
		[Description("步骤宽度景色"), Category("自定义")]
		public int StepWidth
		{
			get { return m_stepWidth; }
			set
			{
				m_stepWidth = value;
				Refresh();
			}
		}

		/// <summary>
		/// The m steps
		/// </summary>
		private string[] m_steps = new string[] { "step1", "step2", "step3" };

		/// <summary>
		/// Gets or sets the steps.
		/// </summary>
		/// <value>The steps.</value>
		[Description("步骤"), Category("自定义")]
		public string[] Steps
		{
			get { return m_steps; }
			set
			{
                if (value == null || value.Length < 1)
					return;
				m_steps = value;
				Refresh();
			}
		}

		/// <summary>
		/// The m step index
		/// </summary>
		private int m_stepIndex = 0;

		/// <summary>
		/// Gets or sets the index of the step.
		/// </summary>
		/// <value>The index of the step.</value>
		[Description("步骤位置"), Category("自定义")]
		public int StepIndex
		{
			get { return m_stepIndex; }
			set
			{
				if (value > Steps.Length)
					return;
				m_stepIndex = value;
				Refresh();
				if (IndexChecked != null)
				{
					IndexChecked(this, null);
				}
			}
		}

		/// <summary>
		/// The m line width
		/// </summary>
		private int m_lineWidth = 2;

		/// <summary>
		/// Gets or sets the width of the line.
		/// </summary>
		/// <value>The width of the line.</value>
		[Description("连接线宽度,最小2"), Category("自定义")]
		public int LineWidth
		{
			get { return m_lineWidth; }
			set
			{
				if (value < 2)
					return;
				m_lineWidth = value;
				Refresh();
			}
		}

		/// <summary>
		/// The m img completed
		/// </summary>
		private Image m_imgCompleted = null;
		/// <summary>
		/// Gets or sets the img completed.
		/// </summary>
		/// <value>The img completed.</value>
		[Description("已完成步骤图片，当不为空时，已完成步骤将不再显示数字,建议24*24大小"), Category("自定义")]
		public Image ImgCompleted
		{
			get { return m_imgCompleted; }
			set
			{
				m_imgCompleted = value;
				Refresh();
			}
		}

		/// <summary>
		/// The m LST cache rect
		/// </summary>
		List<Rectangle> m_lstCacheRect = new List<Rectangle>();

		/// <summary>
		/// Initializes a new instance of the <see cref="UCStep" /> class.
		/// </summary>
		public UCStep()
		{
			InitializeComponent();
			this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
			this.SetStyle(ControlStyles.DoubleBuffer, true);
			this.SetStyle(ControlStyles.ResizeRedraw, true);
			this.SetStyle(ControlStyles.Selectable, true);
			this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);
			this.SetStyle(ControlStyles.UserPaint, true);
			this.MouseDown += UCStep_MouseDown;
		}

		/// <summary>
		/// Handles the MouseDown event of the UCStep control.
		/// </summary>
		/// <param name="sender">The source of the event.</param>
		/// <param name="e">The <see cref="MouseEventArgs" /> instance containing the event data.</param>
		void UCStep_MouseDown(object sender, MouseEventArgs e)
		{
			var index = m_lstCacheRect.FindIndex(p => p.Contains(e.Location));
			if (index >= 0)
			{
				StepIndex = index + 1;
			}
		}

		/// <summary>
		/// 引发 <see cref="E:System.Windows.Forms.Control.Paint" /> 事件。
		/// </summary>
		/// <param name="e">包含事件数据的 <see cref="T:System.Windows.Forms.PaintEventArgs" />。</param>
		protected override void OnPaint(PaintEventArgs e)
		{
			base.OnPaint(e);
			var g = e.Graphics;
			g.SetGDIHigh();

			if (m_steps != null && m_steps.Length > 0)
			{
				System.Drawing.SizeF sizeFirst = g.MeasureString(m_steps[0], this.Font);
				int y = (this.Height - m_stepWidth - 10 - (int)sizeFirst.Height) / 2;
				if (y < 0)
					y = 0;

				int intTxtY = y + m_stepWidth + 10;
				int intLeft = 0;
				if (sizeFirst.Width > m_stepWidth)
				{
					intLeft = (int)(sizeFirst.Width - m_stepWidth) / 2 + 1;
				}

				int intRight = 0;
				System.Drawing.SizeF sizeEnd = g.MeasureString(m_steps[m_steps.Length - 1], this.Font);
				if (sizeEnd.Width > m_stepWidth)
				{
					intRight = (int)(sizeEnd.Width - m_stepWidth) / 2 + 1;
				}

				int intSplitWidth = 20;
				if (m_steps.Length > 1)
				{
					intSplitWidth = (this.Width - m_steps.Length - (m_steps.Length * m_stepWidth) - intRight - intLeft) / (m_steps.Length - 1);
				}
				
				m_lstCacheRect = new List<Rectangle>();
				for (int i = 0; i < m_steps.Length; i++)
				{
					#region 画圆，横线
					Rectangle rectEllipse = new Rectangle(new Point(intLeft + i * (m_stepWidth + intSplitWidth), y), new Size(m_stepWidth, m_stepWidth));
					m_lstCacheRect.Add(rectEllipse);
					g.FillEllipse(new SolidBrush(m_stepBackColor), rectEllipse);

					if (m_stepIndex > i)
					{
						g.FillEllipse(new SolidBrush(m_stepForeColor), new Rectangle(new Point(intLeft + i * (m_stepWidth + intSplitWidth) + 2, y + 2), new Size(m_stepWidth - 4, m_stepWidth - 4)));

					}
					if (m_stepIndex > i && m_imgCompleted != null)
					{
						g.DrawImage(m_imgCompleted, new Rectangle(new Point((intLeft + i * (m_stepWidth + intSplitWidth) + (m_stepWidth - 24) / 2), y + (m_stepWidth - 24) / 2), new Size(24, 24)), 0, 0, m_imgCompleted.Width, m_imgCompleted.Height, GraphicsUnit.Pixel, null);
					}
					else
					{
						System.Drawing.SizeF _numSize = g.MeasureString((i + 1).ToString(), this.Font);
						g.DrawString((i + 1).ToString(), Font, new SolidBrush(m_stepFontColor), new Point(intLeft + i * (m_stepWidth + intSplitWidth) + (m_stepWidth - (int)_numSize.Width) / 2 + 1, y + (m_stepWidth - (int)_numSize.Height) / 2 + 1));
					}
					#endregion

					System.Drawing.SizeF sizeTxt = g.MeasureString(m_steps[i], this.Font);
					g.DrawString(m_steps[i], Font, new SolidBrush(m_stepIndex > i ? m_stepForeColor : m_stepBackColor), new Point(intLeft + i * (m_stepWidth + intSplitWidth) + (m_stepWidth - (int)sizeTxt.Width) / 2 + 1, intTxtY));
				}

				for (int i = 0; i < m_steps.Length; i++)
				{
					if (m_stepIndex > i)
					{
						if (i != m_steps.Length - 1)
						{
							if (m_stepIndex == i + 1)
							{
								g.DrawLine(new Pen(m_stepForeColor, m_lineWidth), new Point(intLeft + i * (m_stepWidth + intSplitWidth) + m_stepWidth - 3, y + ((m_stepWidth) / 2)), new Point(intLeft + i * (m_stepWidth + intSplitWidth) + m_stepWidth + intSplitWidth / 2, y + ((m_stepWidth) / 2)));
								g.DrawLine(new Pen(m_stepBackColor, m_lineWidth), new Point(intLeft + i * (m_stepWidth + intSplitWidth) + m_stepWidth + intSplitWidth / 2, y + ((m_stepWidth) / 2)), new Point(intLeft + (i + 1) * (m_stepWidth + intSplitWidth) + 10, y + ((m_stepWidth) / 2)));
							}
							else
							{
								g.DrawLine(new Pen(m_stepForeColor, m_lineWidth), new Point(intLeft + i * (m_stepWidth + intSplitWidth) + m_stepWidth - 3, y + ((m_stepWidth) / 2)), new Point(intLeft + (i + 1) * (m_stepWidth + intSplitWidth) + 10, y + ((m_stepWidth) / 2)));
							}
						}
					}
					else
					{
						if (i != m_steps.Length - 1)
						{
							g.DrawLine(new Pen(m_stepBackColor, m_lineWidth), new Point(intLeft + i * (m_stepWidth + intSplitWidth) + m_stepWidth - 3, y + ((m_stepWidth) / 2)), new Point(intLeft + (i + 1) * (m_stepWidth + intSplitWidth) + 10, y + ((m_stepWidth) / 2)));
						}
					}
				}
			}

		}
	}
}
